AR-P.E.P.R. Mount. Proper Eye Position Ready Scope Mount for One Inch Tube Combat Ready Riflescopes Matte Black. Proper Eye Position Ready for combat riflescopes, this mount provides 2 inches of forward scope positioning on the M-4 and AR-15 platform. Ring bases are milled as a single, tough unit, and ring tops feature Picatinny tops for mounting additional accessories. Matte black finish.